Gas engine



June Z5, 1929.

J. A. CHARTER GAS ENGINE Filed March 31. 1921 ansa. oriana-nn, or'cursado, rnnrn'ors.

aas nnarrm.

appuaanaalea aren ai, rear. sanar no. atraer.

rlhis invention relates to gas engines ot ythe general type illustratedin my prior Pat' ent No. 1,106,782, dated August 11,1914, in which arotatable sleeve valve is mounted between inner and outer cylinders, theinner cylinder being capable ot'` longitudinal excarries the thematerials themselves, but the amount of machine and foundry workrequired by making the inner cylinder in two parts make it possible todiscard one oi them either when worn out in actual use or injured inconstruction work without it being necessary to replace both parts. Theinvention Jfurther consists in features and details of constructionhereatter more fully set forth in the specification and claims. w

rlhe-single figure' of the drawin shows a conventional form of outercylin er 2, Water jacketed at 4,'carrying on its lower end crank case 6within which is mounted the crank shaft mechanism 8 including theconnecting rod 10 and attached pistonv12.l Rotatably mounted is the, forthe purposes of this case, conventional rotatable sleeve valve 14,driven by gear mechanism 16 propelled by the worm 18'driven from thecrank shaft by the gearing 20. Inside of this rotatable sleeve, isfreely slipped from the top, a nonthreaded inner cylinder 22 which is atits lower end conventional as to this case in that it slides verticallywith reference to centering blocks 24 and 24a provided for the purposelocated at the upper end of the crank case. Especial attention is calledto the fact that the twoblocks 24 form the lower end of the cylinder 24; that the upper block, preferably 'made of hard steel, forms thebottom or thrust seat for the gear 16 carrying the sleeve valve 14, theoil which necessarily encloses said gear being sealed in by said ring24; also that the inner cylinder '22 slides through both said rings andthat its lower `tire length vall times to lover and embracing flange onthe inner it tightly in place within the notch 28 end extends to-but notbelow-the lower ring 24 by which it is guided and centered in relationto the bore of the cylinder 2-4 provided with water jacket 4.` 'lhisconstruction in combination with the means tor sustaining the upper endof cylinder 22, else- Where described, insures accurate centering of allparts of the inner cylinder while permitting its necessary longitudinalexpansion, thus insuring a space or cavity between the inner and outercylinders extending the enot the valve ci proper size at insure properrotation of the valve 14. lli' the inner cylinder is not so centered theside thrust ot the piston due to angular position of the connecting rodwill, yin certain positions, force the inner cylinder against the sleevevalve and partially or wholly lock it.

The upper end ont this inner cylinder 22 is in accordance with theimprovement ot this invention provided with an angularly outwardlyextending llange 26 of greater diameter than the bore ofthe outercylinder against which sleeve valve 14 rotates so that i it rests in anannularly cut recess 28 preferf ably of cylindrical circumferencewhereby the weight of the inner cylinder22 is carried on a ledgeorvshelf 30 formed in the end of the outer cylinder while the innercylinder l is centered against lateral movement by the outercircumferential wall of the cut 28. For the purposes of this centeringit is of great importance that the outer circumference of liange 26 beconcentric with the outer cir4 cumference of the inner cylinder.

The upper end of the inner cylinder is closed byfavnon-threaded cylinderhead 32 extending any desired predetermined distance into the cylinderand having integral laterally extending llange or lug 34 litting theupper horizontal cylinder and holding provided or it and on the shelf 30provided for it, said llange or lug being provided with a suitableretaining device, that shown in the drawing being the conventional lagbolts 36. i

The cylinder head is provided with a conventional form of water jacket38.

By the use of this construction the inner cylinder 22 can be made of onematerial preferably a hard material, while the cylinder head 32 can bemade of an entirely different material, usually a softer and moreworkable one, or it can be madeof aluminum for lightness, a materialwhich wouldv not be feasible for the inner cylinder 22.

With the inner cylinder made se arate from the cylinder head it is muchc eaper and easier to accurately machine its upper flange'26 to fit intothe recess-28 provided for it, to thereby accurately center the innercylinder with reference to the outer cylinder, than is possible wherethe inner cylinder is made integral with the cylinder head and thesecuring flange, as in'prior constructions.

' The lower end of outer cylinder 2 terminates in inturned flange 78against which rings 24 and 24:n bear and 'seal thus forming oil space 80filled with oil in which gear 18 rotates.

Having thus described my invention, what I claim as new and desire tosecure by Letter 1. In `mechanism of the class described,l an outercylinder having at each end anannular v'notch of greater diameter thanthe bore o the cylinder, and concentric therewith,v a smooth boreuntlireaded innerv cylinder 4 sufliciently smaller than the outercylinder to take a sleeve valve between them, a 4flange on one end ofthe inner cylinder centered in said notch in one end of the youtercylinder, an unthreaded Water j acketed plug shaped head 32 entering andbearing against the inner wall of theinner cylinder securing said flangein said position, the length of said unthreaded plug being substantiallyequal to the diameter of the bore of the inner cylinder to therebypresent an effective seal, means securing said head in place, apositioning ring inserted in the annular notch at the other end of theouter cylinder enclosing and centering the opposite end of said innercylinder,'a secondring in said notch rigidly secured to the .cylinderWall retaining the first ring in position, there being'formed adjacentsaid first ring an annular oil space closed by said ring, said oil spacebeing of greater diameter than the bore ofthe outer cylinder, a sleevevalve rotatable Abetween the inner and outer cylinders, rotating inunison with a gear entering and running in said oil space within theouter cylinder, and positioned lengthwise by the first ring and by theflange on the inner cylinder.

2.' A-gas engine 'comprising an outer cylinderhaving, at each end anannular notch of greater diameter than the bore of the cylinder,

a smooth bore Unthreaded inner cylinder arranged within the outercylinder, a sleeve valve arranged between the inner and outer cylinder,a flange carried at one end of the inner cylinder .and centered in anotch at one end of the outer cylinder, an Unthreaded water jackete'dplug securing' said flange in said position, a ositioning ring insertedin the annular notc at -the opposite end of the outer cylinder forenclosing and centeringthe opposite end of said inner cylinder, aysecond ring in said notch rigidly secured -tol the first rin thecylinder wall and retainin in position, there being formed adjacent saifirst ring, an annular oil space closed byzsaid ring, said oil spacehaving greater diameter than the bore of the outer cylinder, said sleevevalve being rotatable between the inner and outer cylinders, and a gearentering and y running in said oil space within the outer cylinder, androtating in unison with the sleeve valve, said sleeve. being positionedlengthwise by the first ring and by the flange on the inner cylinder;

A gas engine comprising an outer cylinder having, at-each end, anannular notch of greater diameter than the bore of the cylinder andarranged concentricall with the cylinder, a smooth bore unthrea ed innercylinder sufficiently smaller than the outer cylinder to receive asleeve valvebetween the cylinders, a flange formed in one end of saidinner cylinder and centered in a said notch at one end ofthe outercylinder, an unthreaded A water jacketed plug shaped head entering andengaging the inner wall of the inner cylinder for securing said flangein said position, means for securing said head in place, a positioningring arranged in the annular notch at the opposite end of the outercylinder, said positioning ring embracing and centering the opposite endof said inner cylinder, a second ring'arranged in said notch andfastened -to the cylinder wall to retain the first ring in place, anannular oil space formed and arranged in said outer cylinderadja- JAMESA. CHAR-TER.

